Molding-machine



(No Model.) a Sheets-Sheet 1.

' J. E. MCGANNA. MOLDING MACHINE.

' No. 448,987. Patented Mar. 24,'1891.

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NITED STATES PATENT FFICE.

JOHN EDIVARD MOOANNA, OF BALTIMORE, MARYLAND.

MOLDING-MACHINE.

SPECIFICATION forming part of Letters Patent 0. 448,987, dated March 24,1891.

7 Application filed December 8, 1890. Serial No, 373,885. (No model.)

To all whom it may concern.-

Be it known that I, JOHN EDWARD MG- CANNA, of the city of Baltimore andState of Maryland, have invented certain Improvements inMolding-Machines, of which the following is a specification.

In the description of the said invention which follows, reference ismade to the accompanying drawings, forming a part hereof, and in which-Figurel is an exterior front view of the machine, and Fig. 2 anexteriorside view of the same. Fig. 3 is a top View of a part of,themachine, and Fig. 4 a central vertical section of Fig. 2. Figs, 5 and 6are details of the invention.

A is the frame of the machine, having a branched lower end, andterminating at the upper end in a plate B.

O is the pattern-plate bolted tothe plate B, having on its surface a aprojection which corresponds in outline with the pattern to be molded.In the present case only one projection b, which is cylindrical inshape, is employed and upon it is the pattern D, consisting of acircular disk.

E is the face-plate, having an opening corresponding in shape to thepattern. In the drawings this opening is circular, so as to make theplate fit closely around the pattern seated on the projection or bossI).

F is the base for the face-plate E, and it is slotted so as to admit ofits movement independently of the frame A. The slots are shown in dottedlines. It has four lugs 0, through which bolts 01 pass, and these boltssecure it to the face-plate. Of course it will be understood that when adifferent pattern is to be molded a different face-plate is employed. Inother words, the face-plate must in all cases conform in shape ofopening to the pattern.

The face-plate E and its base F, which are bolted together, have avertical movement for a purpose hereinafter described. WVhen theface-plate is at its lowest position, as shown particularly in Fig. 4,its upper surface is flush with the top of the pattern-boss and thepattern D projects its full thickness above it.

G is the rammer-frame consisting of a bar bent into a rectangle withlugs f at two of its sides. Within this frame is supported the rammer H,which consists of the board g and the tucker h secured together. Theboard g has a hole i extending transversely of it, and in it is placed arod j with its ends in holesk in the lugsf. By means of this pivotal rodj the manner H may be turned on its axis, so as to bring either its flatside or the side having the tucking-flanges 1% over the ma- J J arecranks on the shaft I, connected by means of the pin q. 7

K is a link which connects the crank-pinq to a cross-head L, adapted tohave a vertical sliding movement within slots r in the two branches ofthe frame A. This cross-head is protected from the action of sand bymeans of a cover 8, which is slotted at itslower edge to admit of themovement of the link K.

M M are bars which at their upper ends pass through the lugs f of theralnmer-frame, and

at their lower ends they are loosely connected to the cross-head L.

N and O are rollers on studs 15, which project from the lugs a on theframe A. Each bar M has a projection a on one side thereof, with aninclined upperjface Z2, and on the other side of the bar is anotherprojection c, with an inclined lower face d, for purposes hereinafterdescribed.

P P are guiding-hooks attached by means of clamps e and keys f to thebars M. The object of these hooks will hereinafter appean' Q is ahand-lever keyed to the main shaft I, by means of which the rammer ismade to have a reciprocating movement.

As before stated, the base-plate F, carrying the face-plate E, has avertical movement, and this is effected through the medium of a crank Ron a shaft S, supported in suit-able hearings in the frame A, a link Tleading from the crank-pin g" to lugs h on the under side of thebase-plate, and a hand-lever U. In order that the face-plate E may havea steady movement as the lever U is operated, the base F is providedwith two guide-bars V, which slide within bearings formed in a downwardprojection XV of the frame A.

X is a sand-hopper supported in any suitable manner from the ceiling ofthe foundry or from the machine. This hopper has a hinged bottom m and asand-gate n. The cubical content of the space in the hopper between thegate and the hinged door is designed to be slightly more than that ofthe flask, so that when the hopper is filled and the gate and hingeddoor are closed the flask maybe filled by merely opening the said door.

Supposing the various parts of the machine to be relatively placed asshown in the drawings, the operation of molding is as follows:

The pattern and face-plate are first dusted over with some partingmaterial, such as plumbago. A flask is then placed on the faceplate andcharged with sand either by shovel or from the hopper X. The hand-leverQ is now drawn forward and operating through the cranks J, theircrank-pin q, link K, crosshead L, and the bars M draw down therammer-frame G and its rammer H. The downward movement of the rammer atfirst or before it reaches the flask is at an angle with reference tothe'vertical center line of the machine; but the inclined faces (1' ofthe projections 0 coming in contact with the rollers N cause the bars M,with the rammer, to swing forward until the points of the guidehooks Pcome in contact with the rollers O, and the said bars are therebybrought into a vertical situation. The position of the bars at this timeis illustrated in Fig. (3. The remaining portion of the movement of thebars effected through the hand-lever is now vertical, and thetucker-section of the rammer being underneath or down the flanges m ofthe tucker enters the filled flask near to its sides and compress thesand at that place. The lever Q, is now thrown back, which at firstmerely raises the rammer; but as the inclined faces I) of theprojections ct come in contact with the rollers O the bars M are thrownbackward, the guiding-hooks P rising from the said rollers and admittingof that movement. At the same time the straight faces 0 of theprojections 0 pass above the rollers N and allow of the completion ofthe said backward movement. The rammer now assumes its originalposition. The rammer is next turned or reversed in position, whichbrings the flat side down, and after more sand has been added to theflask, so asto fill the space made by the tucker-flanges, the rant mingoperation as described is repeated. After the hand-lever Q, is a secondtime thrown back, the compressed sand projecting above the flask istrimmed off and the faceplate and flask raised from the pattern. This isaccomplished by pulling down the handlever U, which, through the mediumof the crank R and link T, which is pivoted to the base of theface-plate, raises the face-plate and 'its flask containing the mold.WVhile the hand-lever U is in its depressed position the flask iscovered by a follow-board, lifted from the face-plate, turned over, andplaced aside.

The hand-lever U is now raised, which brings the face-plate into itsoriginal position, another flask is laid on the face-plate, and themolding operation, as before described, repeated.

It will be understood that the pattern is so arranged on thepattern-plate that the flasks all match, and any two of them may beclamped together to form a complete mold.

I claim as my invention- 1. In a molding-machine, the combination of aframe, a rammer, bars attached at their upper ends to the said rammer, across-head, to which the lower ends of the said bars are pivoted, aprojection on the forward side of the said bars having an inclined upperface, and a roller in the path of the said projections, whereby in theelevation of the crosshead the inclined surfaces of the said projectionscome in contact with the said rollers, and the said bars with the rammerare thrown back, substantially as specified.

2. In a molding-machine, the combination of a frame, a rammer, barsattached at their upper ends to the said rammer, a cross-head, to whichthe lower ends of the said bars are pivoted, a projection on therearward side of the said bars having an inclined under surface, and aroller in the path of the said projections, whereby in the depression ofthe said cross-head the inclined surfaces of the said projections comeincontact with the said rollers, and the said bars with the rammer arethrown forward, substantially as specified.

In a molding-machine, the combination of a frame, a ra1nmer,a pair ofbars attached at their upper ends to the said rammer, a cross-head towhich the lower ends of the said bars are pivoted, hooks on the forwardside of the, said bars, and rollers in the path of the points of thesaid hooks when the said bars are in a backward inclined position orapproaching a vertical position, which hooks as the cross-head isdepressed pass over the said rollers and draw the said bars to avertical position, substantially as specified.

J OIIN EDWARD MCOANNA.

Witnesses:

DANL. FIsHuR, WM. '1. HOWARD.

